I request that What Application Indicators are available? be "refreshed" to show which indicators are still being maintained and usable in 12.04.
Yes - I fully agree with you ... its a community wiki and thus its up-to the Ask Ubuntu community, that includes both yourself and myself to go through the answers and update them to include the most up-to date information.
Can I suggest - for those indicators that are not yet 12.04 compatible that the answer includes with the version(s) they work with - for example:
Install from PPA (11.04/11.10/12.04) -
ppa:indicator-multiload/stable-daily and install package
indicator-multiload in Ubuntu Software Centre (for 12.04 only)
Where the indicator can be installed from the software-center: